Here's why:
* They have a set encounter: Legendary Pokémon are designed to be encountered once per game. There's no chance of them running away and you'll always have a chance to catch them.
* Capture rates: While their capture rates are low, they are not affected by the flee mechanic.
However, there are some things to keep in mind:
* They can be fainted: If you don't have the right Pokémon or strategy, you can still faint them, meaning you'll need to find them again.
* They can be damaged: You can damage legendary Pokémon during the battle, which can lower their HP and make it harder to catch them.
Always be prepared with the right tools:
* Master Balls: Master Balls are guaranteed to catch any Pokémon, so you can use one if you want to ensure you capture a legendary.
* Ultra Balls: Ultra Balls are the best choice for catching legendary Pokémon.
* Status Conditions: Using status conditions like sleep or paralysis can increase your chances of catching them.
* High level Pokémon: Having a high level Pokémon will make it easier to land hits and defeat any weaker Pokémon guarding the legendary Pokémon.